Why has your Worcester Bosch boiler started flashing with the blue light? Here we cover the most common causes and fixes.
You might be feeling pretty bewildered, if not alarmed to see a flashing blue on your Worcester Bosch boiler.
But fear not, because you’ve come to the right place to learn what this light means and what you can do to resolve it.
Let’s dive in and shine a ‘light’ on this issue.
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Why Is There a Flashing Blue Light on My Worcester Boiler?
If you notice a flashing blue light on your Worcester boiler’s control panel, there are several potential explanations as to why this is happening.
In some cases, you might simply need to reset your boiler and in other cases, you’d need to hire a qualified heating engineer to fix a specific problem with your boiler.
When a flashing blue light is present on a Worcester boiler, an error code should also appear at the same time.
Each error code has its own meaning and as already alluded to, a variety of potential solutions.
The Error Codes That Could Accompany a Flashing Blue Light
Note: To find out about the potential fixes for each of these error codes, skip to the next section.
If you see an error code (along with the flashing blue light) as should be the case, there are five potential fault codes that could appear.
You will likely see one of the following error codes:
Error Code EA
There is an issue with the gas supply or there is a flue blockage (depending on the model).Error Code CE 207
The boiler pressure is low.Error Code D5 or EA
Condensate pipe blockage.Service Mode
When the blue light is flashing rapidly, this means your boiler has entered service mode.
How to Fix These Error Codes
As touched on, there is a range of potential explanations for each error code and depending on the model, the overall meaning of the codes could vary.
In other words, on the one hand, fault codes generally have a single overall meaning (i.e., they relate to just one specific problem with the boiler), although in some cases they can appear for different reasons and thus could appear for different problems.
And then there is usually a range of various potential solutions for each error code/boiler problem.
Obviously, there would be one set of potential fixes when an error code has just one overall meaning, but there would be several sets of potential fixes, with each set/list being unique to each of the meanings/problems that the error code might signify.
EA Fault Code
Since an EA fault code can appear with various meanings, we’ve broken them down accordingly.
Gas Supply Issue
For those with a Worcester Bosch Ri model, a blue flashing light and EA fault code together mean that gas is not being supplied to your boiler.
If this occurs and you suspect there is an issue with the gas supply, your first port of call should be to work out whether the problem is with your boiler or the gas supply itself.
For the latter, you can simply check other gas appliances throughout your home, if you have any (e.g., a gas hob or gas oven).
If none of your gas appliances is working, then you can be virtually certain that the issue is with the supply itself. If this is the case, you should contact your gas supplier.
On the other hand, if your boiler isn’t receiving a gas supply while other gas appliances are, you’ll need to hire a Gas Safe Register engineer.
They’ll be able to look at your boiler, identify the exact cause of the issue, and hopefully fix it there and then.
Read our Worcester Bosch vs Viessmann Boilers review if you need some help in choosing between these two popular brands.
Flue Blockage
A scenario where an EA fault code might appear with a Worcester boiler (and a flashing blue light) is if your boiler flue is blocked.
This would be an especially concerning issue since the flue is used to carry harmful exhaust gases from your heating system to the outside where it is released into the atmosphere.
Should it become blocked, these gases can accumulate and leak into your home which would pose serious safety hazards.
If you are concerned about a potential flue blockage, you should ensure that your boiler remains turned off.
Ideally, you should turn off the gas supply too so long as you know how to safely and effectively undertake this task.
Either way, as soon as your boiler is off (and you’ve turned off the gas supply if you know how), you should hire a qualified heating engineer immediately.
They will then be able to unblock your boiler flue or replace it entirely if required.
At this stage, you might want to consider having a flue guard installed as this would stop debris from entering your flue and causing another blockage in the future.
CE 207 Error Code
As mentioned, a flashing blue light along with the Worcester CE 207 fault code relates to low pressure.
Boilers tend to lose water pressure over time, meaning that on occasion, they need to be topped up with water (a.k.a., re-pressurised).
Be sure to check the pressure gauge first to determine whether the water pressure is actually low.
With most boiler models, the pressure gauge should read somewhere between 1.0 bar and 2 bars.
However, you should check your Worcester boiler’s manual to verify what the ideal pressure gauge range is for your specific boiler model.
Thankfully, once you know what you’re doing (you can see your boiler manual for further details), it’s okay to top up your boiler’s water pressure DIY.
If your boiler’s water pressure has dropped below the correct range, you’ll need to top it up.
Be careful not to top it too much, however. But even if that does happen, you can always bleed your radiators to reduce the water pressure and bring it back down to somewhere within the correct range.
D5 or EA Error Code
When the fault code D5 occurs with a flashing blue light on a Worcester boiler, it means that your condensate pipe is blocked.
And, as you can tell, an EA fault code might also accompany a flashing blue light due to a blocked condensate pipe.
All condensing boilers feature a condensate pipe. This pipe is used to expel wastewater from your property by pouring it out into an outside drain.
However, when it’s especially cold out, there’s a chance that your condensate pipe could freeze over. The ice that would form inside would naturally block any wastewater from making its way out of your home.
The good news is that a frozen condensate pipe is generally fine to undertake DIY, with some safety precautions of course.
You can simply try thawing the pipe by pouring hot water over it. However, the water should not be boiling as this could cause damage to the pipe.
Also, even without the water boiling, watch out for any hot water that might splash off the pipe and head in your direction.
Moreover, as the condensate pipe thaws, plenty of wastewater might come out fast, so take caution to avoid getting splashed by this also.
If in any doubt, it’s best to hire a qualified heating engineer to be on the safe side.
Related heating/energy guides:
Service Mode
If your boiler’s blue light is flashing in rapid succession, this means that your boiler has entered service mode.
This may be because it was unintentionally left in service mode by an engineer (during a recent servicing), or maybe you accidentally knocked off the switch yourself.
Cost of Fixing Your Boiler
There are many potential fixes that could apply to a flashing blue light and presumably an error code alongside it (more than we’ve covered here).
However, we’ll now look at the estimated price tag of the most common solutions.
Here are the costs of the potential solutions brought up today:
Unblocking a flue
£30 to £120Replacing a boiler flue
£200 to £600Repressurising a boiler
£30 to £120Fixing a blocked condensate pipe
£30 to £120Switching your boiler off service mode
£30 to £120Replacing a boiler
£800 to £2,800 *
*In the event that the heating engineer discovers a fundamental issue with your boiler to the point that it’s beyond economic repair, you’d need to have it replaced. Obviously, this isn’t a likely outcome but it’s a possibility, thus why we’ve added it to the list.
If you need to have your boiler replaced soon or at some point in the future, you’ll be glad to know that there are ways of keeping your upfront costs to a minimum, such as purchasing a boiler on finance.
This would allow you to buy now and pay later generally over a 12–24-month timespan.
What’s more, there are even zero-interest options on the market. Of course, you should only take on credit if you are confident that you can comfortably repay it.
The same would apply if, for instance, you decided to take out a loan to purchase a new boiler.
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